1. When measuring fuel pressure, the #2 vac hose that Bentley's has you
disconnect is NOT the one going to the vacuum unit. It is the one going
to the fuel pressure regulator. Sharper eyes would catch the faint
leader from "2" and the hose on the photo. Someone who knows what he is
doing would know that that's the hose to disconnect. When Dennis and
Mark said that my results made no sense, they were (of course) right.
Sigh. I are an idiot. My apologies for wasting everyone's bandwidth on
this one.

2. While Bentley's does not directly tell us what normal manifold vacuum
should be, it can be inferred from several of the test procedures in the
manual, i.e., ignition settings p. 28.30, which specify maximum vacuums
of 360 mbar (27 cm Hg = 10 - 11'' Hg). My manifold measures at 11'' Hg.
I compared this reading with a second instrument with the same result,
and with a second Vanagon with a nicely-running engine which also had
11'' Hg. Things I Learned Today.

So. Whatever is responsible for my mileage being poorer than what others
report (results on http://camping.elliott.googlepages.com/poormileage )
ain't vacuum or fuel-pressure related. The other things I have checked
are on that poormileage page. I have not checked for brain damage,
though. Based on what I have learned today, it's worth doing.

--
Mike "Rocket J Squirrel" Elliott
71 Type 2: the Wonderbus
84 Westfalia: Mellow Yellow ("The Electrical Banana")
74 Utility Trailer. Ladybug Trailer, Inc., San Juan Capistrano
KG6RCR